VPNaaS: vyatta-agent hangs with oslo-msg warning on monkey patch

[Sridhar Ramaswamy]

In latest neutron* repo based code, vyatta-vpn-agent process hangs almost immediately after coming up. None of he periodic_tasks run and process doesn't respond to any rpc messages from the neutron-server.

Following warning is seen the logs,

Connected to AMQP server on 192.168.110.205:5672
2015-03-19 16:32:21.605 DEBUG oslo_messaging._executors.impl_eventlet [req-4b23b95e-721d-4b90-ac44-f4c9d6a4bd13 None None ] eventlet executor in use but the threading module has not been monkeypatched or has been monkeypatched after the oslo.messaging l ibrary have been loaded. This will results in unpredictable behavior. In the future, we will raise a RuntimeException in this case. from ( pid=15579) __init__ /usr/local/lib/python2.7/dist-packages/oslo_messaging/_executors/impl_eventlet.py:78

[Sridhar Ramaswamy (srics-r)]

This seems to be related to the following patchsets that re-factored monkey-patching for eventlet,

https://review.openstack.org/#/c/156942/
https://review.openstack.org/#/c/155374/

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/166366

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/166366
Committed: https://git.openstack.org/cgit/openstack/neutron-vpnaas/commit/?id=840c34f9428cc4b7db6dbc610a72e3ed5957e04c
Submitter: Jenkins
Branch: master

commit 840c34f9428cc4b7db6dbc610a72e3ed5957e04c
Author: Sridhar Ramaswamy <email address hidden>
Date: Fri Mar 20 13:16:35 2015 -0700

    Introduce Vyatta VPN agent cmd in monkey patched eventlet module

    Commit [1] introduced an entry for reference vpn agent in cmd/eventlet module
    so that they get monkey patched in an uniform way. This commit introduces the
    same for vyatta vpn agent.

    [1] I2d7081dbd4cb532332e3b66667bb8c71aa5a6658

    Change-Id: Icc3c8f040bd4fbb2ad36e3d32a381a7ba7993d53
    Closes-Bug: 1434337